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Finding the Fourth Proportional to 159,321.88, 219,870.48 and 87,708.56

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Solution

The fourth proportional to 159,321.88, 219,870.48 and 87,708.56 is: 121,041.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,321.88 : 219,870.48 = 87,708.56 : x
  2. Step 2: Convert to fraction form
    159,321.88/219,870.48 = 87,708.56/x
  3. Step 3: Cross multiply
    159,321.88x = 219,870.48 × 87,708.56
  4. Step 4: Simplify right side
    159,321.88x = 19,284,523,187.31
  5. Step 5: Solve for x
    x = 19,284,523,187.31/159,321.88
  6. Step 6: Final answer
    x = 121,041.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.